If I go to "Install -> Protocol", I get the message "Could not add the requested component. The error is: The system cannot find the file specified".

When I tried installing 'Simple TCP/IP Services' in "Add/Remove Windows Components -> Networking" I got the error "Could not install the Simple TCP/IP Services component because a file or registry entry is missing".

I've tried updating my network adapter drivers, resetting TCP/IP, using Winsock Fix and running SFC, but have had no luck.

Also, I'm not sure if this is relevant, but if I right click the 'Internet Connection' icon and click 'Settings' I get "The Internet Connection Sharing computer is not configured to let network users control or disable the shared internet connection".

Can anyone explain what might be causing this behaviour? It doesn't seem to be causing any connection problems, but I would like to be able to access TCP/IP Properties to sort out a static ip.

I'm sorry, I forgot to mention that I'd tried everything on that page aswell, but no luck sadly. I think it's describing something different anyway, as all the icons in 'Network Connections' are showing up fine, it's just the Connection Properties dialogs that aren't right.

I did, however, notice that the properties for my 1394 connection are fine, and have the name of the adapter as well as 'File and Printer Sharing' and 'TCP/IP'. It's just the Bluetooth, LAN and Wireless properties that aren't working. Does that shed any light on the issue?

I have the same problem as . I'm using (or better to say, I was using) the Cisco VPN Client 5.0.01.0600. Since it suddenly stopped to work properly, I tried to reinstall it, got stuck at uninstalling DNE (Deterministic Network Enhancer) subcomponent, tried manual uninstall as Cisco advised (it worked only partly) and ended up with brute-force registry editing that ended up with corrupted networking environment in Windows XP.

I spent last night trying to figure it out, but it went nowhere. At the moment, my safest bet is to reinstall "Simple TCP/IP Services" from Windows install CD, but this doesn't work either, the installed says "Could not install the Simple TCP/IP services component because a file or registry entry is missing".

I've already tried that a couple of times, but it hasn't made a difference. I don't think it's an issue with the network adapter as I have the same problem on my LAN, Wireless, and Bluetooth connections.

Thank you for replies. I've tried this also with my wifi adapter, it got reinstalled in the Device Manager, but it completely disappeared from "Network Connections" that means I cannot use it at the moment. My internal LAN card the only network device that still works (luckily).

I still think it has something to do with "Simple TCP/IP Services" that I'm not able to install.